SubTerra is a puzzle game released in 2001 designed and developed by Crystal Shard. SubTerra can be described as a free, optional donation game and can be played on the following operating systems: Windows, Linux. SubTerra is part of the SubTerra series.
“An exciting puzzle game requiring a good mixture of reflex action and thoughtful planning, SubTerra puts you in a maze with falling boulders, floating balloons, enemies, replicators, laser beams, and massive explosions. Between all these traps, you need to plan carefully and run for your life to make it to the exit with enough gems.” - Crystal Shard